Greptile Summary

This PR fixes MDX pages that import Figure.tsx failing to render after being patched into the docs-website branch, by including the component in the set of support files copied during patch-devnotes. It also tightens the CI trigger so that changes to the publish script, the workflow itself, or Figure.tsx automatically re-run publishing without requiring an unrelated docs edit.

• fern/scripts/fern-published-branch.py: Adds fern/components/Figure.tsx to FERN_DEVNOTE_SUPPORT_PATHS, which is iterated in patch_devnotes to copy support files into the published branch — exactly parallel to how Authors.tsx, BlogCard.tsx, and the other kit components are handled.
• publish-fern-devnotes.yml: Adds three path filters (Figure.tsx, the publish script, and the workflow file itself) so any change to these support files triggers a publish run.
• test_fern_published_branch.py: Seeds Figure.tsx in the test fixture and asserts it lands in the published root, giving a regression guard for the fix.

Important Files Changed

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Push to main] -->|path filter matches| B[publish-fern-devnotes.yml]
    B --> C[Checkout workflow / source / website]
    C --> D[patch-devnotes]
    D --> E[sync_fern_root_config]
    D --> F[copy FERN_DEVNOTE_SUPPORT_PATHS]
    F --> F1[fern/assets]
    F --> F2[Authors.tsx]
    F --> F3[BlogCard.tsx]
    F --> F4[Figure.tsx new]
    F --> F5[MetricsTable.tsx]
    F --> F6[TrajectoryViewer.tsx]
    F --> F7[fern/components/devnotes]
    D --> G[rewrite devnotes nav block]
    G --> H[Commit & push to docs-website]
    H --> I[npx fern generate --docs]

_{Reviews (1): Last reviewed commit: "docs: publish devnote figure component" | Re-trigger Greptile}

MkDocs preview: https://adeda8cf.dd-docs-preview.pages.dev

Fern preview: https://nvidia-preview-pr-721.docs.buildwithfern.com/nemo/datadesigner

Fern previews include the docs-website version archive with PR changes synced into latest. Notebook tutorials are rendered without execution outputs in previews.

Review: PR #721 — docs: publish devnote figure component

Summary

Small, surgical fix (8 additions, 0 deletions across 3 files) that repairs the Fern Dev Notes publish path so MDX pages importing the shared Figure component can render after being patched into the docs-website branch. The PR also broadens the publish workflow's path filter so future repairs to the support copier or Figure.tsx actually trigger a publish without needing an unrelated docs edit to ride along.

Three concrete changes:

1. fern/scripts/fern-published-branch.py — adds fern/components/Figure.tsx to FERN_DEVNOTE_SUPPORT_PATHS.
2. .github/workflows/publish-fern-devnotes.yml — adds three new path-filter entries: the workflow itself, the publish script, and Figure.tsx.
3. packages/data-designer/tests/docs/test_fern_published_branch.py — adds a regression assertion that Figure.tsx is copied into the published tree.

Findings

Correctness — looks good

• Figure.tsx follows the same component-injects-its-own-CSS pattern as Authors.tsx (uses <style dangerouslySetInnerHTML={{ __html: FIGURE_CSS }} />). This matches the comment in fern-published-branch.py:41-43 explaining why dev-note kit components don't need a paired stylesheet entry. No companion fern/styles/figure.css is needed in either the support-paths list or the workflow path filter — the change is self-consistent.
• The FERN_DEVNOTE_SUPPORT_PATHS list stays alphabetically ordered (Authors, BlogCard, Figure, MetricsTable, TrajectoryViewer). Good.
• The workflow path filter also remains lexically sorted. Mixing .github/... and fern/scripts/... entries in among the fern/components/... and fern/styles/... entries is fine by sort order, though it does fragment the visual grouping a bit — minor, not worth changing.
• Self-triggering on workflow edits (.github/workflows/publish-fern-devnotes.yml) is the right call here: repairs to this workflow should be able to publish without piggybacking on an unrelated docs change. This is the same convention used in many self-hosted publish workflows.
• Adding fern/scripts/fern-published-branch.py to the path filter closes the same gap for the publish script. Sensible.

Test coverage — adequate

• The new assertion (test_fern_published_branch.py:129-131) follows the established pattern for verifying support-path copies, and the corresponding setup line at :66 plants a small fixture file. This matches how other support files are exercised in the same test (the test already covers assets/current-devnote-asset.png).
• One observation, not a request: only Figure.tsx and assets/... are exercised positively in this single test. Other entries in FERN_DEVNOTE_SUPPORT_PATHS (Authors, BlogCard, MetricsTable, TrajectoryViewer, devnotes) are not individually asserted. That's pre-existing, not introduced here.

Style / conventions — clean

• Alphabetic ordering preserved in both the Python list and the YAML path filter.
• Test uses the existing write_text helper rather than rolling its own.
• The MDX/component change is consistent with the previously merged 8bd231383 docs(devnotes): add Nemotron-Personas dev note and ad6a1e420 docs: re-adopt global theme; components self-inject CSS direction.

Risks — low

• Blast radius is confined to the docs publish workflow. No production code paths or package internals touched.
• Backward compat: copying an additional file into the published tree is additive — there's no risk of clobbering an unrelated published artifact under that path (the test already validates published-only-asset.png is removed when not in source, but that's by design and unrelated to this addition).
• No secrets, no destructive ops, no schema changes.

Nits (non-blocking)

• The test at line 129 uses the somewhat verbose form (published_root / "fern" / "components" / "Figure.tsx").read_text() == (...). A direct == "export const Figure = () => null;\n" literal would be slightly more readable, but the existing surrounding assertions use the same parenthesized form for symmetry. Leave it.
• Considered worth verifying once locally that an MDX page importing @/components/Figure resolves through Fern after the patch — the PR description's manual checks (fern-api check, ruff, pytest) cover the structural side, but the rendered-page side is implicitly covered only when the next devnote with <Figure> lands. Acceptable given the targeted nature of the fix.

Verdict

Approve in spirit (no formal approval per CI policy). The PR is minimal, well-scoped, internally consistent, has a regression test that pins the new behavior, and addresses both the immediate symptom (missing component in published tree) and the meta-issue (path filter that wouldn't have re-triggered on the fix itself). Ready to merge once CI is green.